Home / 21,195.90-31,793.85-12,892.20

Finding the Fourth Proportional to 21,195.90, 31,793.85 and 12,892.20

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Solution

The fourth proportional to 21,195.90, 31,793.85 and 12,892.20 is: 19,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.90 : 31,793.85 = 12,892.20 : x
  2. Step 2: Convert to fraction form
    21,195.90/31,793.85 = 12,892.20/x
  3. Step 3: Cross multiply
    21,195.90x = 31,793.85 × 12,892.20
  4. Step 4: Simplify right side
    21,195.90x = 409,892,672.97
  5. Step 5: Solve for x
    x = 409,892,672.97/21,195.90
  6. Step 6: Final answer
    x = 19,338.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.